A minecraft server start script that syncs worlds between server installs. Works between windows/linux/mac/etc, but if on windows, the windows server must be the main as it can't read linux/osx partitions.

mc-server-start.sh

#!/bin/bash

set -e

world=<world-name>

main=<main server install>
new=<new server install>

mkdir -p "${main}/bak"
mkdir -p "${new}/bak"

if [ ! -d "${new}/${world}" ] 
then
    cp -R "${main}/${world}" "${new}/${world}"
    mv "${main}/${world}" "${main}/bak/${world}-$(date +%Y%m%d%H%M%S)"
else
    read -p "CHECK WORLD" -n1 -s
    break
fi

if ! grep -q "eula=true" eula.txt; then
    echo "Do you agree to the Mojang EULA available at https://account.mojang.com/documents/minecraft_eula ?"
    read -N 1 -p "[y/n] " EULA
    if [ "$EULA" = "y" ]; then
        echo "eula=true" > eula.txt
        echo
    fi
fi
"jre/jdk8u312-b07-jre/bin/java" -javaagent:log4jfix/Log4jPatcher-1.0.0.jar -XX:+UseG1GC -XX:+UnlockExperimentalVMOptions -Xmx4096M -Xms4096M -jar forge-1.12.2-14.23.5.2855.jar nogui

cp -R "${new}/${world}" "${main}/${world}"
mv "${new}/${world}" "${new}/bak/${world}-$(date +%Y%m%d%H%M%S)"